I'm also a Seltzer Sisters customer and like them a lot. One thing to note though is that I just received a mailing that they are going to expand into grocery stores sometime soon. Apparently they have a bottle (disposable?) that can dispense without the contents going flat. That is the reason I use the service. I can't finish a 1 ltr. bottle before it loses it's fizz. Home delivery in SF and really nice customer service seal the deal for me.

My dear departed father had a seltzer service years ago in the Los Angeles area and I regret not purloining a couple of the old bottles for their looks....and they looked like they'd been in service for decades.